Grinding noise from heater fan

Technical questions and answers about the Mazda Bongo

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southcoastrob
Junior Bongonaut
Posts: 15
Joined: Sat Aug 04, 2007 8:59 am
Location: Falmouth, Cornwall
Contact:

Grinding noise from heater fan

Post by southcoastrob » Sun Oct 21, 2007 10:11 pm

Hi Everyone,

When I turn on the heater fan, I get a very horrible griding noise from what I presume is the fan. Any ideas?

Cheers.
MattK

Post by MattK » Sun Oct 21, 2007 11:25 pm

something similar happened to me, and was easy to sort out.......

If you lift the bonnet there is a large grey intake where the air gets drawn into the fan. This intake thing is held on with little pop-fasteners.

One of my fasteners had come off and got sucked into the intake so every time I turned the fan on, the fins on the spinning fan would rub against the fastener and made a very nasty noise indeed.

You should be able to take off the grey cover and have a look.
southcoastrob
Junior Bongonaut
Posts: 15
Joined: Sat Aug 04, 2007 8:59 am
Location: Falmouth, Cornwall
Contact:

Post by southcoastrob » Mon Oct 22, 2007 4:32 pm

MattK wrote:something similar happened to me, and was easy to sort out.......

If you lift the bonnet there is a large grey intake where the air gets drawn into the fan. This intake thing is held on with little pop-fasteners.

One of my fasteners had come off and got sucked into the intake so every time I turned the fan on, the fins on the spinning fan would rub against the fastener and made a very nasty noise indeed.

You should be able to take off the grey cover and have a look.
Hi Matt,

I have taken off the cover but can not see any thing inside and the fan seems to be moving freely? I have 2 x pop fasteners is this correct?

Cheers
southcoastrob
Junior Bongonaut
Posts: 15
Joined: Sat Aug 04, 2007 8:59 am
Location: Falmouth, Cornwall
Contact:

Post by southcoastrob » Thu Nov 22, 2007 11:56 am

Local garage have taken out the motor and they say it has worn bearings! Would this mean new motor? I guess it would.

Any body out there scrapping a bongo with a heater motor available?
Socket Set Sue

Worn bearings

Post by Socket Set Sue » Thu Nov 22, 2007 4:59 pm

I would say the bearings need copious amount of light oil, leave for several hours and oil again, and again. You will find the bearings are sintered bronze which are full of tiny miniscule cavities where the oil can penetrate an sit for years helped by the felt pad the bearing sits on, this also acts as an oil resevoir, but they do eventually dry out and need replenishing.

If you don't try this you will probably spend £100.00 + for nothing.

Hope this helps.
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